CODE 66. Valid Number

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版权声明：本文为博主原创文章，转载请注明出处：http://blog.jerkybible.com/2013/10/07/2013-10-07-CODE 66 Valid Number/

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Validate if a given string is numeric.
Some examples:
"0" => true
" 0.1 " => true
"abc" => false
"1 a" => false
"2e10" => true

Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.

public boolean isNumber(String s) {
	// Start typing your Java solution below
	// DO NOT write main() function
	String regExp = "[ ]*[+|-]{0,1}([0-9]+\\.{0,1}|([0-9]*\\.[0-9]+))(e[+|-]{0,1}[0-9]+){0,1}[ ]*";
	return s.matches(regExp);
}